Eclipse of Pluto on April 2, 1986

Eclipse of Pluto on April 2, 1986. The figure shows the light curve (time vrs. magnitude (logarithmic intensity)), as observed during an eclipse when Charon passed in front of Pluto on April 2, 1986. The dashed curve shows the light variation predicted by the best fitting geometric and photometric parameters, that is those mentioned in the text. (ESO Press Release eso8610)